mark phillips is in london. mark, good morning. >> reporter: good morning, norah, charlie. the attack is said to have been by a suicide bomber and took place at one of the security guards to the embassy building. the actual attack was captured in this cell phone footage. the bomber seems to have self-detonated inside the guard building, blowing the door off its hinges. turkish security guard was killed. there was at least one other serious injury outside. the main embassy building does not appear to have been damaged. none of the staff there hurt. the u.s. ambassador offered his sympathies to the family of the guard. >> from today's event it's clear we both suffer from this terrible, terrible problem of today's world and we're determined after events like this only more to cooperate together until we defeat this problem together. >> turkey has seen a number of terror attacks over the years, organized not just by islamist militants but by internal groups. turkey state tv says the bomber was a suspected member of a far left group within the country, and this is the week when